RX300 LCD Screen Failure Help!

I had a new battery put in my 2000 rx300 by Advance Auto and now my LCD screen does not work. Can anyone tell me why and what could have caused this. They tell me I have to prove that the battery change caused this. Please, Please, someone help. Thank you

We purchased a pre-owned 2003 Lexus RX300 (3) years ago and we are getting a "disc not found" GPS error on the LCD screen. We recently purchased a new battery and also wondered if this may effect the GPS? We had also had 3 separate previous occurrences of the GPS losing track of our position, which eventually reset itself. Any idea on a fix other than take it to the dealer? Your help would be very much appreciated!